There is no Jewish Sabbath and Christian Sabbath. It's the Sabbath of the LORD thy God and in this we find unity. Amen!
Mat_15:2 Why do thy disciples transgress the tradition of the elders? for they wash not their hands when they eat bread.
Mat_15:3 But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition?
Mar_7:13 Making the word of God of none effect through your tradition, which ye have delivered: and many such like things do ye.
Col_2:8 Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ.
So those Gentiles who believe that Christ changed His Sabbaths to Sunday will not find one verse where Christ changed the Sabbath to Sunday. What we do find in history is that the pagans worshipped their god on Sunday and Constantine who had persecuted the early church believers who rested on the Sabbath stated that Sunday would be the new day to rest and this pleased the pagans and some of weaker faith then joined up with the Sunday as the now Christian day. IMO, God hates our mixing ourselves with Him and paganism. Why can't Christians see that all we need is God's ways? Rest on the Sabbath. Do like Daniel, pray (which is worshiping) three times a day everyday facing Jerusalem.